The name "Curse of Tippecanoe" derives from the 1811 battle. As governor of the Indiana Territory, William Harrison used questionable tactics in the negotiation of the 1809 Treaty of Fort McHenry with Native Americans, in which they ceded large tracts of land to the U.S. government.[2] The treaty further angered the Shawnee leader Tecumseh, and brought government soldiers and Native Americans to the brink of war in a period known as Tecumseh's War. Tecumseh and his brother organized a group of Indian tribes designed to resist the westward expansion of the United States. In 1811, Tecumseh's forces, led by his brother, attacked Harrison's army in the Battle of Tippecanoe, earning Harrison fame and the nickname "Old Tippecanoe".[2] Harrison strengthened his reputation even more by defeating the British at the Battle of the Thames during the War of 1812.[2] In an account of the aftermath of the battle, Tecumseh's brother Tenskwatawa, known as the Prophet, supposedly set a curse against Harrison and future White House occupants who became president during years with the same end number as Harrison. This is the basis of the curse legend.[3]